I have a 40LA on my AVISTAR, it will not take off on a grass runway of any length. I don't think a 46LA would provide any more power than the 40.

I would like to thank everone who contributed to this thread, because I had the same questions about a radio and engine. I am also considering a second plane, the difference is I want something a little bigger like a 4* 60. There is one at our flying field with an OS 61 It appears to fly very well and have very good vertical performance.

We have a very weird thing that happens with Futaba radios at our field, we call it the Futaba Zone, were when the model is over a certain part of the field it take a "hit". Every plane is different in the things it does, for instance mine takes up throttle, right rudder, and up elevator, for about a second. And it only happens to people flying with Futaba. Has anyone head of this happening with other brands of radios, recievers? This will influence my decision on which brand of radio to buy. [8D]